Process for the preparation of indolone derivative
US7619095B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 15, 2006 |
| Grant date | Nov 17, 2009 |
| Priority date | — |
| Expiry date | May 2, 2026 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P25/16
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the preparation of 4-[2-(Di-n-propylamino)ethyl]-2,3-dihydro-1H-indol-2-one of formula (I) and its pharmaceutically acceptable salts, solvates Formula I involving new intermediates of compound of formula (A) and (B) wherein R represents (i) a halogen atom selected from fluorine, chlorine atom, bromine atom and iodine atom; (ii) lower alkanesulfonyloxy group selected from methanesulfonyloxy, ethanesulfonyloxy, isopropanesulfonyloxy, propanesulfonyloxy, butanesulfonyloxy, tert-butanesulfonyloxy, pentanesulfonyloxy, hexanesulfonyloxy; (iii) substituted or unsubstantiated arylsulfonyloxy group selected from phenylsulfonyloxy, 4-methylphenylsulfonyloxy, 2-methylphenylsulfonyloxy, 4-nitrophenylsulfonyloxy, 4-methoxyphenylsulfonyloxy, 3-chlorophenylsulfonyloxy; (iv) arylalkylsulfonyloxy group selected from benzylsulfonyloxy, 2-phenylethylsulfonyloxy, 4-phenylbutylsulfonyloxy, 4-methylbenzylsulfonyloxy, 2-methylbenzylsulfonyloxy, 4-nitrobenzylsulfonyloxy, 4-methoxybenzylsulfonyloxy, 3-chlorobenzylsulfonyloxy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.